Discharging transfer process for fabrics



J, J. KAU FMANN DISCHARGING TRANSFER 1" RQCESS FOR FABRICS Filed April 1 1925 anbwboz JerameJ. Kaufmann.

Patented Feb. 8, 1927.

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JEROME J. KAUr ANN, or NEW YORK, N. Y.

- mscnaneme rnansrna rnocnss FOR rnnmcs.

Application filed April 1,

This invention relates to a discharging transfer process for indication on fabrics and the like various indicia, legends, numerals, designs and the like.

The object of the invention comprises the steps of a transfer to produce what is com-, merciallykno wn-as a discharge print, by means of which a colorless indicium is produced on thefabric treated. The second objcct of the invention comprises the stepsby which. the color of the fabric is removed and replacedwith an indicium of another color. I

In the accompanying drawings an exemplification of apparatus to carry out the steps of the invention is shown, and in which Fig. 1 is an elevation of such apparatus, and Fig. 2 shows an enlarged section of Fig. 1 on the line 2, 2.

In the drawings a plurality of hollow holders 20,, are supported on the vertical pipes 21, fitted with the valves 22. A steam supply pipe is connected to the pipes 22. Drain pipes 26 with the valves 27 extend from each of the pipes 21.

A stocking 30 in this instance is supported on each of the holders 20.

Detachable clamps in this instance are each shown to comprise the curved members 35, with the handle ends 36. The members are connected to each other by the pin 37. A helical spring 39 encircles the pin 37 and has one end thereof fastened to one of the members 35 and its'otherend is fastened to the other member, tending to close said members A cushion 40 of a pliable material is secured to the inner face of eachof the members 35. A supporting rod 41 is located above the holders 20, and has suspended therefrom a plurality of, the said clamps, by. means of the springs 42.

To produce what is commercially known as adischarge print, the following steps are taken; v Metallic zinc dust is mixed with an equal quantity by weight of powdered bisulphite ofsoda, with a su'flicient quantity of glucose to form amixtnre suitable for printing. An in'dicium legend. numeral or other design required and the like. is printed with the mixture on a base like paper to produce a label, and the label produced is located on the moist fabric to be treated and heat is applied. In this instance the stocking 30 is first made moist and is then located on one of the holders The base 46 is located in heat and removing said base.

1926. -Seria1'No. 99,182.

place on the stocking 30 with the printed matterbearing against it and is held in position by the clamps having the members 35.

.- The heat given out by the steam furnished by the pipe 25 and its appurtenances and the moisture in the stocking, produces a chemical reaction and the powdered zinc and bisulphite of soda produce hydrosulphite of soda. The latter discolors the fabric pro- 6 ducing. a colorless representation of the printed matter of the label on the fabric of the stocking as indicated at 49 The hydrosulphite of soda in the steps just described functions to discolor the fabric treat- 7.0 ed and functions as an assistant if a coloring agent is added, as for instance vat colors. Or there maybe added an assistant like so dium sulphide. Or a mordant like chloride of tin or sulphate of aluminum may be added to the powdered zinc and bisulphite of soda to fix the color if any are used.

"and bisulphite of soda which is not affected 39 by the hydrosulphite 'of soda produced. With the latter ingredient added instead of the colorless indication on the fabric it will be colored with the dye added as indicated at 50 withits dots.

The invention mav' be modified by'loeating the moist fabric in a heated chamber, instead of usingthe holders 20. In such a case solid'holders or other appurtenances are used for holding the fabrics, and the clamps with the curved members 35 or other appurtenances can be used to clamp the bases in place on the fabrics. Various mod fications may be made in the.

invention and the present exemplification is 95,

to be taken as illustrative and not limitative thereof. Having described my invention what I desire' to secure by Letters Patent and claim m0 1s:

1. The process of making. a discharge print on a fabric, consisting in indicating on a base, a legend, numeral and other indicia by means of a chemical ingredient having the inherent property. of dischargingand turning colorless a dyed fabric and the like, pressing saidbase to contact its ingre dients to the surface of a colored fabric, subjecting said elements to moisture and U 2. The process of making a discharge print on a fabric, consisting in preparing a mixture of ingredients having the inherent property of dischargingand turning color- 3. The process of making a dischargeprint on a fabric, consisting in moistening the fabric, mixing equal quantities by weight of powdered metallic zinc and bisulphite of soda, adding a sufiicient quantity of glucose to adapt the mixture for printing, adding a coloring agent to themixture not affected by the other ingredients or by any reaction thereof, said coloring agent amounting to about ten percent in weight of the other ingredients, locating the mixture on a base, locating the base with its mixture bearing on the fabric, heating the elements and producing with the ingredients hydrosulphite of soda, discoloring the fabric with the latter compound and coloring the fabric with said coloring agent.

4. The process of making a discharge V print on a fabric, consisting in making a mixture of powdered metallic zinc and bisulphite of soda, adding a thickening agent to the mixture, printing an indicium on a base with said mixture, locating the base so that its mixture bears on a colored fabric, and subjecting the fabric and the base with its mixture to moisture and heat and removing the base and producing the indicium in the form of a discharge print on the fabric.

- 5. The process of making a discharge print on a fabric consisting in moistening the fabric, making a mixture of powdered metallic zinc and bisulphite of soda, adding a thickening agent to the mixture, indicating an indicium and the like with the thickened mixture on a paper base, pressing the base with its mixture bearing on the fabric,

' heating, forming hydrosulphite of soda, discoloring the fabric with the latter compound and producing a colorless indicium on the fabric and removing the base. g

6. The process of making a discharge print on a, fabric consisting in moistening the fabric, mixing equal quantities by weight of powdered metallic zinc and bisulphite of soda, adding a sufficient quantity of glucose, ,to adapt the mixture for printing on abase of paper and the like, pressing the base with its ingredients bear-.

ing onthe fabric and heating, thereby prothe fabric, mixing equal 'quanti ties by weight of powdered metallic zinc and bisulphite of soda, adding a sufficient quantity of glucose to adapt the mixture for printing, add ing a dye coloring agent .to the mixture not affected by the other ingredients or by any 7 reaction thereof, adding a mordant to the mixture, printing with the mixture on a base, locating the base with its mixture bearing on the fabric, heating the elements and producing hydrosulphite of soda, discolor ing the fabric with the mixture and coloring the fabric with said coloring ,agent and mordant. a

8. The process of making a discharge print on a fabric, the fabric, mixing equal quantities by weight of powdered metallic zinc and bisulphite of soda, adding a sufficient quantity of glucose to adapt the mixture for printing, adding a dye coloring agent to the mix ture not affected by the other ingredients or by any reaction thereof, adding an assistant to the mixture, printing with the mixtrre on a base, locating the'base with its mixture bearing on the fabric, heating the elements and producing hydrosulphite of soda, discoloring the fabric with the mix ture and coloring the fabric with said coloring agent and assistant.

In testimony whereof I afiix my slgnature. s

JEROME-J. KAUFMAN consisting in moistening 

